US4231922A
Expired / Lapsed
US
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Impact modified polyarylate blends
Assignee: BP Corp North America Inc
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Filing: 1979-06-18
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Granted: 1980-11-04
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Expires: 1999-06-18
Abstract
Abstract Described herein are polyarylate molding compositions having improved notched izod impact values after molding, which composition comprises a blend of a polyarylate, a polyester, and an impact modifier which is a graft copolymer of a vinyl aromatic, an acrylate, an unsaturated nitrile, or mixtures thereof, grafted onto an unsaturated elastomeric backbone and having a tensile modulus of less than about 100,000 psi. Also, decabromodiphenyl oxide may be included in said composition.
Inventors
- 👤 Lloyd M. Robeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:21
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08L67/03
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
87 words
A thermoplastic molding composition having improved notched izod impact values after molding, said composition comprising in admixture: (a) a polyarylate derived from a dihydric phenol and an aromatic dicarboxylic acid; (b) a polyester derived from an aliphatic or cycloaliphatic diol, or mixtures thereof, and an aromatic dicarboxylic acid; and (c) an impact modifier which is a graft copolymer of a vinyl aromatic, an acrylate, an unsaturated nitrile, or mixtures thereof, grafted onto an unsaturated elastomeric backbone and having a tensile modulus of less than about 100,000 psi.
Claim 2
Dependent Claim
87 words
A thermoplastic molding composition having improved notched izod impact values after molding, said composition comprising in admixture: (a) a polyarylate derived from a dihydric phenol and an aromatic dicarboxylic acid; (b) a polyester derived from an aliphatic or cycloaliphatic diol, or mixtures thereof, and an aromatic dicarboxylic acid; and (c) an impact modifier which is a graft copolymer of a vinyl aromatic, an acrylate, an unsaturated nitrile, or mixtures thereof, grafted onto an unsaturated elastomeric backbone and having a tensile modulus of less than about 100,000 psi.
Claim 3
Dependent Claim
86 words
A composition as defined in claim 1 wherein said polyarylate is derived from a dihydric phenol or a mixture of dihydric phenols, said dihydric phenol having the following formula: ##STR8## wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, z has a value of 0 to 4, inclusive and R' is a divalent saturated aliphatic hydrocarbon radical having from 1 to 3 carbon atoms and cycloalkylene radicals having up to and including 9 carbon atoms and a dicarboxylic acid.
Claim 4
Dependent Claim
49 words
A composition as defined in claim 2 wherein the dihydric phenol is used in combination with a dihydric phenol of the following formula: ##STR9## wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine and z has a value of 0 to 4.
Claim 5
Dependent Claim
18 words
A composition as defined in claim 2 wherein the polyarylate is derived from Bisphenol-A and an aromatic-dicarboxylic acid.
Claim 6
Dependent Claim
19 words
A composition as defined in claim 1 wherein the polyarylate is derived from a dihydric phenol and isophthalic acid.
Claim 7
Dependent Claim
25 words
A composition as defined in claim 1 wherein the polyarylate is derived from a dihydric phenol and a mixture of isophthalic acid and terephthalic acid.
Claim 8
Dependent Claim
23 words
A composition as defined in claim 1 wherein the polyarylate is present in amounts of from about 10 to about 85 weight percent.
Claim 9
Dependent Claim
23 words
A composition as defined in claim 7 wherein the polyarylate is present in amounts of from about 15 to about 80 weight percent.
Claim 10
Dependent Claim
41 words
A composition as defined in claim 1 wherein said polyester is derived from an aliphatic diol and an aromatic dicarboxylic acid and has repeating units of the general formula: ##STR10## wherein n is a whole number of from 2 to 4.
Claim 11
Dependent Claim
13 words
A composition as defined in claim 9 wherein the polyester is poly(ethylene terephthalate).
Claim 12
Dependent Claim
70 words
A composition as defined in claim 1 wherein said polyester is derived from a cycloaliphatic diol and an aromatic dicarboxylic acid and has repeating units of the general formula: ##STR11## wherein the cyclohexane ring is selected from the group consisting of the cis- and trans-isomers thereof and R represents an aryl radical containing from 6 to 20 carbon atoms which is the decarboxylated residue derived from an aromatic dicarboxylic acid.
Claim 13
Dependent Claim
18 words
A composition as defined in claim 11 wherein the polyester has repeating units of the general formula: ##STR12##
Claim 14
Dependent Claim
108 words
A composition as defined in claim 1 wherein the polyester is derived from a mixture of an aliphatic diol, a cycloaliphatic diol and an aromatic dicarboxylic acid and has repeating units of the general formula: ##STR13## wherein the cyclohexane ring is selected from the group consisting of the cis- and trans-isomers thereof, R represents an aryl radical containing from 6 to 20 carbon atoms which is the decarboxylated residue derived from an aromatic dicarboxylic acid, m is an integer of 2 to 4, x units comprise from about 10 to about 90 percent by weight and y units comprise from about 10 to about 90 percent by weight.
Claim 15
Dependent Claim
18 words
A composition as defined in claim 13 wherein the polyester has repeating units of the general formula: ##STR14##
Claim 16
Dependent Claim
23 words
A composition as defined in claim 1 wherein the polyester is used in amounts of from about 12 to about 80 weight percent.
Claim 17
Dependent Claim
23 words
A composition as defined in claim 15 wherein the polyester is used in amounts of from about 20 to about 70 weight percent.
Claim 18
Dependent Claim
22 words
A composition as defined in claim 1 wherein the vinyl aromatic of (C) is selected from styrene, alphamethylstyrene, alkylstyrene, or mixtures thereof.
Claim 19
Dependent Claim
26 words
A composition as defined in claim 1 wherein the acrylate of (C) is selected from methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, or mixtures thereof.
Claim 20
Dependent Claim
21 words
A composition as defined in claim 1 wherein the unsaturated nitrile of (C) is selected from acrylonitrile, methacrylonitrile, or mixtures thereof.
Claim 21
Dependent Claim
26 words
A composition as defined in claim 1 wherein the unsaturated elastomeric backbone of the impact modifier is selected from polybutadiene, poly(butadiene-co-styrene), poly(butadiene-co-acrylonitrile), poly(isoprene), or mixtures thereof.
Claim 22
Dependent Claim
25 words
A composition as defined in claim 1 wherein the impact modifier has a tensile modulus of from about 15,000 to less than about 100,000 psi.
Claim 23
Dependent Claim
33 words
A composition as defined in claim 1 wherein the impact modifier is present in amounts of from about 2 to about 30 percent by weight, based on the total weight of the composition.
Claim 24
Dependent Claim
11 words
A composition as defined in claim 1 which contains decabromodiphenyl oxide.
Claim 25
Dependent Claim
33 words
A composition as defined in claim 23 wherein the decabromodiphenyl oxide is present in amount of from about 4 to about 20 percent by weight, based on the total weight of the composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |